[Glitch] Convert easy entrypoints files to Typescript

Port 36909065b5 to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/flavours/glitch/entrypoints/error.ts

@@ -0,0 +1,18 @@
+import '@/entrypoints/public-path';
+import ready from 'flavours/glitch/ready';
+
+ready(() => {
+  const image = document.querySelector<HTMLImageElement>('img');
+
+  if (!image) return;
+
+  image.addEventListener('mouseenter', () => {
+    image.src = '/oops.gif';
+  });
+
+  image.addEventListener('mouseleave', () => {
+    image.src = '/oops.png';
+  });
+}).catch((e: unknown) => {
+  console.error(e);
+});